diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index e9677b80d9d4..6873e2145441 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -27,10 +27,10 @@ rec {
 
 
   ack = buildPerlPackage rec {
-    name = "ack-2.02";
+    name = "ack-2.12";
     src = fetchurl {
       url = "mirror://cpan/authors/id/P/PE/PETDANCE/${name}.tar.gz";
-      sha256 = "de5560f2ce6334f3f83bef4ee942fdb09b792f05cf534fe67be3cb0431bf758f";
+      sha256 = "0avxpgg1fvib4354d9a9710j63sgxpb5j07if5qr83apq9xx7wjj";
     };
     # use gnused so that the preCheck command passes
     buildInputs = stdenv.lib.optional stdenv.isDarwin [ gnused ];